作者:
J_Alves
参考:
OpenClipart
A model (with "artistic license") of the steroid cholesterol, the basis of steroid hormones. Blue-grey is carbon, white is hydrogen, red is oxygen. Drawn in Inkscape.
执照:
公有领域。 免费供个人和商业使用。 无需注明出处。 更多信息。
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